1. Why sleep matters-the economic costs of insufficient sleep: a cross-country comparative analysis;Hafner;Rand Health Q,2017
2. Announcement: sleep awareness week, April 23–29, 2017;The Centers for Disease Control and Prevention (CDC);Morb Mortal Wkly Rep (MMWR),2017
3. National sleep foundation’s sleep time duration recommendations: methodology and results summary;Hirshkowitz;Sleep Health,2015
4. Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society;Watson;Sleep,2015